John Garcia and Robert Koelling demonstrated how biology can strongly
influence classical conditioning.
Classical conditioning involves two stimuli being linked together to elicit a
learned response in organisms.
John Garcia and Robert Koelling made use of flavored water. There was
pairing of the taste (a conditioned stimulus) with nausea (an unconditioned
stimulus) which gave rise to the sickness experienced. In cases where the
taste was paired with other unconditioned stimuli, no conditioning occurred.
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